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Finding the Fourth Proportional to 18,884.76, 28,308.78 and 9,021.48

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Solution

The fourth proportional to 18,884.76, 28,308.78 and 9,021.48 is: 13,523.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,884.76 : 28,308.78 = 9,021.48 : x
  2. Step 2: Convert to fraction form
    18,884.76/28,308.78 = 9,021.48/x
  3. Step 3: Cross multiply
    18,884.76x = 28,308.78 × 9,021.48
  4. Step 4: Simplify right side
    18,884.76x = 255,387,092.59
  5. Step 5: Solve for x
    x = 255,387,092.59/18,884.76
  6. Step 6: Final answer
    x = 13,523.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.